To our knowledge, there's no correlation between a man's singing ability and his care and attentiveness as a father. But any Pavarotti among the nightingales will serenade his mate while she sits on her eggs. And after they hatch, he will visit the nest about 16 times each hour to feed their offspring, because, among nightingales at least, the best singers also make the best fathers. So finds a study in the journal BMC Evolutionary Biology.
Some 80% of birds practice biparental care, meaning both the male and female rear their offspring together. So it's crucial for a female bird to pick as a mate the most promising father, both genetically and behaviorally. Female birds look for signs of fitness that range from the flamboyant plumage of the peacock to the bizarre mating dances of birds of paradise. And for nightingales, it's the most elaborate song that apparently wins the day.
The average male has some 180 tunes in his repertoire. These avian Sinatras vocalize highly variable song types including buzzes, whistles, and trills. And such virtuoso singing seems to signal the female that this is the guy she can count on. That is, when it's time to help raise the kids, he's not a flight risk.
据我们所知，男性的歌唱能力与他能否成为一位慈父并无关联。但在夜莺中，任何一位帕瓦罗蒂式的雄性夜莺都会在配偶孵蛋时，为爱妻哼唱小夜曲。孵化结束后，雄性夜莺会以大约每小时 16 次的频率探望小夜莺，并给它们喂食。所以说，至少在夜莺中，顶尖歌手也会成为模范父亲。这项研究已在《BMC 进化生物学》杂志上发表。
大约 80% 的鸟类都采用双亲抚育模式，即雌鸟和雄鸟共同抚育后代。因此对雌鸟而言，不管是从基因角度还是从行为角度，找到一位靠谱的配偶至关重要。雌鸟的择偶标准各异，如孔雀喜欢华丽的羽毛，天堂鸟看重奇异的舞蹈，不一而足。对夜莺而言，最精心准备的歌曲无疑能赢得雌鸟的芳心。
每只雄性夜莺平均有 180 首曲目。这些鸟中唱将能够发出诸如蜂鸣、哨音及颤音等多变音调。这些歌唱大师无疑是在向雌鸟发出信号，证明自己值得依靠。换言之，当需要肩负养育后代的重任时，它们不会拍拍翅膀走人。